relevant radionuclides for the calculation of the … · 2010. 10. 7. · claudia landstetter,...
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![Page 1: RELEVANT RADIONUCLIDES FOR THE CALCULATION OF THE … · 2010. 10. 7. · Claudia Landstetter, 7.9.2010 22 • Codex Alimentarius Austriacus section B1 • Total dose can be determined](https://reader033.vdocument.in/reader033/viewer/2022060801/608602bdc57ff000ad7082d6/html5/thumbnails/1.jpg)
Österreichische Agentur für Gesundheit und Ernährungssicherheit GmbHwww.ages.at
RELEVANT RADIONUCLIDES FOR THE CALCULATION OF THE TOTAL DOSE IN
AUSTRIAN DRINKING WATER
Mag. Claudia LandstetterCC Radiation Protection and Radiochemistry
LSC 2010Paris, 5.9.2010 – 10.9.2010
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www.ages.at 2Claudia Landstetter, 7.9.2010
•Ground- and drinking water project is funded by
•Federal Ministry of Health•Federal Ministry of Agriculture, Forestry, Environment and Water Management
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www.ages.at 3Claudia Landstetter, 7.9.2010
Aim of the Project
• overview of the distribution of natural radionuclide activity concentration levels in ground water bodies
• identify regions with high activity concentrations • identify regions with activity concentrations
below the lower limit of detection• data can be used for risk assessment within
drinking water analyses
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www.ages.at 4Claudia Landstetter, 7.9.2010
Drinking water analyses
• detect natural radionuclides with dose relevant concentrations
• concentrate on regions with high activity concentrations
• establish a risk based monitoring program
- area-wide monitoring every year- measured in a 5 to 10 year period
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www.ages.at 5Claudia Landstetter, 7.9.2010
• 2500 measuring points all over austria for themonitoring of gound water bodies
• 463 measuring points• ground water used for drinking water abstraction
and not used for drinking water abstraction
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www.ages.at 6Claudia Landstetter, 7.9.2010
1275
25
43
147
78
4141
Upper Austria
Burgenland
Lower Austria
StyriaSalzburg
Carinthia
Tyrol
Vorarlberg
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www.ages.at 7Claudia Landstetter, 7.9.2010
226RaLSC
210Pb, 210Po, 228Ra, 226Ra
LSC
3HLSC
238UICP-MS
222RnLSC
2 L of water sample
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www.ages.at 8Claudia Landstetter, 7.9.2010
Sampling
• 2 bottles• 1 acidified with 8 ml HNO3 shortly after the
sample was filled into the bottle• 1 for 222Rn filled carefully and caped
immediately
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www.ages.at 9Claudia Landstetter, 7.9.2010
3H determination via LSC
- 10 ml water sample- 10 ml Quicksafe 400™- measured with a Quantulus 1220™
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www.ages.at 10Claudia Landstetter, 7.9.2010
238U determination by ICP-MS
- direct introduction of the acidified samples- no chemical pre-treatment- Rhodium used as internal standard
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www.ages.at 11Claudia Landstetter, 7.9.2010
222Rn determination via LSC
- gastight bottle with appropriate size- 10 ml of the water + 10 ml of Perkin Elmer high efficiency
mineral oil scintillator™- 222Rn in equilibrium with 218Po and 214Po
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www.ages.at 12Claudia Landstetter, 7.9.2010
226Ra determination via LSC
- 10 ml of the water + 10 ml of Perkin Elmer high efficiency mineral oil scintillator™
- 226Ra measured after in equilibrium with 222Rn- 222Rn in equilibrium with 218Po and 214Po
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www.ages.at 13Claudia Landstetter, 7.9.2010
228Ra, 226Ra, 210Pb, 210Po determinationby LSC
1 L of water sample + Pb- carrier + Ba-carrier
precipitation with 1 M Na2S at pH 1.5
filtrate for 228Ra determination fumed off with HNO3 and HCl
coprecipitated with 1 M H2SO4 and BaCl2 solution at pH 2-3
dissolved in 0,25 M EDTA
after adding Hisafe 3 measured by LSC with alpha beta separation
precipitate fumed off with HNO3 und HCl
dissolved in 1M HCl und 7,5 M H3PO4
210Bi and 210Po selectively extracted with Polex™
measured by LSC with alpha beta separation
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www.ages.at 14Claudia Landstetter, 7.9.2010
222Rn Activity Concentration in Austrian Ground Water
0
20
40
60
80
100
120
140
160
< LLD 0,25 - 10 10 - 20 20 - 30 30 - 60 60 - 100 100 - 200 200 - 300 300 - 400 > 400
Bq/L
Num
ber o
f Sam
ples
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www.ages.at 15Claudia Landstetter, 7.9.2010
3H Activity Concentration in Austrian Ground Water
0
50
100
150
200
250
300
< LLD 1,28 - 1,75 1,75 - 2,25 2,25 - 2,75 2,75 - 3
Bq/L
Num
ber o
f Sam
ples
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www.ages.at 16Claudia Landstetter, 7.9.2010
238U Concentration in Austrian Ground Water
0
50
100
150
200
250
300
< LLD 0,05 - 1 1 - 2 2 - 3 3 - 5 5 - 10 10 - 15 15 - 20 > 20
µg/L
Num
ber o
f Sam
ples
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www.ages.at 17Claudia Landstetter, 7.9.2010
226Ra Activity Concentration in Austrian Ground Water
0
10
20
30
40
50
60
70
80
90
< LLD 1 - 5 5 - 10 10 - 15 15 - 20 20 - 30 30 - 60 > 60
mBq/L
Num
ber o
f Sam
ples
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www.ages.at 18Claudia Landstetter, 7.9.2010
228Ra Activity Concentration in Austrian Ground Water
0
20
40
60
80
100
120
140
160
180
< LLD 7 - 15 15 - 25 25 - 40 > 40
mBq/L
Num
ber o
f Sam
ples
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www.ages.at 19Claudia Landstetter, 7.9.2010
210Pb Activity Concentration in Austrian Ground Water
0
20
40
60
80
100
120
140
160
< LLD 4 - 10 10 - 20 20 - 30 > 30
mBq/L
Num
ber o
f Sam
ples
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www.ages.at 20Claudia Landstetter, 7.9.2010
210Po Activity Concentration in Austrian Ground Water
0
20
40
60
80
100
120
140
160
< LLD 2 - 10 10 - 20 20 - 30 > 30
mBq/L
Num
ber
of S
ampl
es
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www.ages.at 21Claudia Landstetter, 7.9.2010
• Council Directive 98/83/EC (1998) on the quality of water intended for human consumption
• Drinking water ordinance BGBl. II Nr. 304/2001• indicator parametric value:
- Tritium 100 Bq/L - Total Indicative Dose (TID) 0.1 mSv/a
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www.ages.at 22Claudia Landstetter, 7.9.2010
• Codex Alimentarius Austriacus section B1 • Total dose can be determined by Austrian Standard for
determination and evaluation of the total dose due to radionuclides in drinking water (OE-NORM, ON-S 5251, 2005)
• Total dose: - 226Ra and 228Ra are taken into account - 238U, 234U minor contribution to the effective dose 232Th and 234Th with
low solubility in water- Artificial radionuclides and other natural radionuclides (with the
exception of Tritium, 40K, 222Rn and its progenies) are taken into account if dose-relevant concentrations can be suspected
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www.ages.at 23Claudia Landstetter, 7.9.2010
Total Dose (ÖNORM ON-S5251)
0
20
40
60
80
100
120
140
160
180
< 0,005 0,005 - 0,01 0,01 - 0,02 0,02 - 0,03 0,03 - 0,05 0,05 - 0,1 > 0,1
mSv/a
Num
ber o
f Sam
ples
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www.ages.at 24Claudia Landstetter, 7.9.2010
Total Dose (including 210Pb, 210Po)
0
20
40
60
80
100
120
140
160
180
< 0,005 0,005 - 0,01 0,01 - 0,02 0,02 - 0,03 0,03 - 0,05 0,05 - 0,1 > 0,1
mSv/a
Num
ber o
f Sam
ples
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www.ages.at 25Claudia Landstetter, 7.9.2010
Vorarlberg
TyrolSalzburg Styria
Lower AustriaUpper Austria
Burgenland
Carinthia
222Rn > 100 Bq/L238U > 10 µg/L
Ground Water
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www.ages.at 26Claudia Landstetter, 7.9.2010
Vorarlberg
TyrolSalzburg Styria
Lower AustriaUpper Austria
Burgenland
Carinthia
226Ra > 30 mBq/L228Ra > 25 mBq/L
Ground Water
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www.ages.at 27Claudia Landstetter, 7.9.2010
Vorarlberg
TyrolSalzburg Styria
Lower AustriaUpper Austria
Burgenland
Carinthia
210Pb > 25 mBq/L210Po > 20 mBq/L
Ground Water
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www.ages.at 28Claudia Landstetter, 7.9.2010
Conclusion
• regions with higher activity concentrations weredefined
• Just one sample was measured for which the total dose exceeds the total indicative dose of 0.1 mSv/a. But this ground water is not used for drinking water abstraction.
• Fundamental data was obtained to es tablish a more risk based monitoring program for further drinking water analyses